Fix: Workaround empty Trigger Request deserialization issue

[leonmceniery]

Workaround found here: Unity-Technologies/Unity-Robotics-Hub#390 (comment)

Looks good for now until we can move away from Unity Robotics packages.

[sven-hoek]

Aw man...so I guess If we ever would want to send SnowtocolPing, SnowtocolGetDeviceInfo or SnowtocolResetParams from the UI, we'd need to add something in here, too? 😞
(They also have empty requests)

[leonmceniery]

Aw man...so I guess If we ever would want to send SnowtocolPing, SnowtocolGetDeviceInfo or SnowtocolResetParams from the UI, we'd need to add something in here, too? 😞 (They also have empty requests)

YEP!! But I think if we run into this again is open up their deserializer and fix the issue under the hood